京津冀地区水生态系统服务演变规律及其驱动力分析

Analysis on the Evolution Law and Driving Force of Water Ecosystem Services in Beijing-Tianjin-Hebei Region

通过建立水生态系统服务评价指标体系,对京津冀地区2003—2013年间的水分调节、水质净化、水资源供给、水生境提供4项服务用6项指数进行评价,并通过逐步线性回归方法识别综合服务水平与社会经济发展间的关系。京津冀10年内水生态系统服务功能不断下降;北京水生态系统服务功能最差,天津略好于河北,但可通过协同发展实现全区环境保护一体化;京、津、冀水生态系统服务能力的主要驱动力差异较大,分别为城镇化水平、二产规模和一产规模,据此提出了区域优化调整社会经济发展、促进水生态系统服务能力提升的对策建议。

This research established an evaluation indicator system for water ecosystem services,and evaluated four types of services,which are water conditioning,water purification,water supply,and aquatic habitat supply,in Beijing-Tianjin-Hebei region from 2003 to2013 with six indicators. In addition,step wise linear regression method was used to identify the relationship between comprehensive service level and social economic development. The results showed that the regional water ecosystem services deteriorated during the observed ten years. Beijing shared the worst water ecosystem services,and Tianjin was slightly better than Hebei,but the situation can be improved through collaborative development. The driving force for Beijing,Tianjin,and Hebei is urbanization level,industrial scale,and agricultural scale respectively,according to which countermeasures and suggestions for optimizing social-economic development and improving water ecosystem service were made in this paper.